', 0]])->column('root_id'); $saves = []; $arr = ['社群营销', '推广技巧', '网销获客', '邀约转化', '团队管理', '微电影', '短视频广告']; foreach ($root_ids as $v) { foreach ($arr as $v2) { $saves[] = [ 'root_id' => $v, 'name' => $v2 ]; } } (new TrainClassCate())->saveAll($saves); } }